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DirectX 66 (or DX66) is a set of drivers distributed by Microsoft that offer improved visual and audio performance. Its main function, and the one for which it is best known, is allow you to run games with excellent state of the art graphics in video games. View full description

DirectX 66 is basically windows based software which adds efficiency while displaying the images and affects in games. One can enjoy the best features by doing DirectX 66 Version Free Download.

DirectX 66 is basically windows based program Interface (API) which is product of Microsoft with the end goal of showing superb pictures and video. It is primarily being utilized with the end goal of top notch recreations and motion pictures.

These are only the major updates that I have listed. There were quite a few other updates and versions which were either minor or Operating System specific. If you want to know more about all the versions of DirectX, you may visit this Wikipedia page.